Emergency power supply



FIG. 1 is a perspective view of an emergency power supply showing ournew design;

FIG. 2 is a perspective view viewed from another angle thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines depict portions of the emergency power supply that formno part of the claimed design.

CLAIM The ornamental design for an emergency power supply, as shown anddescribed.